Factor completely. 25x^2 + 40xy + 16y^2

Factor. s^2(t – u) – 9t^2(t – u)

Factor completely. 25x^2 + 40xy + 16y^2

Factor. s^2(t – u) – 9t^2(t – u)

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For the top: Hint: a^{2} + 2ab + b^{2} = (a+b)^{2 }

For the bottom: factor out (t-u) from both terms to get (t-u)(s^{2} - 9t^{2}). Factor the second set of parentheses. (Hint: Difference of two squares)

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